Improvement in rolling-mills



para can.

'waited (gratta l@Attn Jenn s, r0F NE WB URG O H I 0 l team Paeitrlvo. 106,063, eategznugtst 2, 1870. g

`The Schedule referred to in these Letters Patent and making part pf the sme.

`several views. i

l i V Objectt're. l

` ",lhis invention relates to a `mill for rolling iugot-s `into blooms, by the .employlnentgofl a painot' rollers arranged oneabove'the other, and reversiblerin their rotating movement, and,` adjustable in'"'their verticalv relation toeach other, so that ,the ingot, lhaving been run throngh'lfrom onefsideof the mill, is` returned `through the same grooveby a reverse rotation of the rollers, as hereinafterdescribed;

. l migrante. II r'rthe drawing, i l A B represent a pairA of stays or frames, secured to 'each' other at the top by brace-bolts, O, and-at their base by a hed orframe-work, `'Dr In the base of aid .framesis journaled `roller,'E,v

in `stationafny seats, immediately-above which is journaled a corresponding roller, F, in movable blocks G,

` iig. 3, whereby said roller may be adjusted in its relation of distance to the roller E, by adjusting-screws H, fora purpose `hereinafter shown.

To each of` the screws referred to is `attached an u arm, I, ig.,4, whereby-they. are connected to each other, and operated simultaneously by a' link, J, said link being' connected to a vertical lever, K, by means of a link, L, whereby it is actuated for operating the screws, for the purpose above mentioned.

l Each of thc'rollcrsE F is alike divided into passesV i l or grooves, M,'by means of collars N. The diameters l of said grooves increase in regular order from vone to four, thereby producing `a corresponding decrease 1n the distance of the two rollers from each other.

Q ".Ou' each side of the roller `E (rear and front) is journaleda plain roller,`0.]?, ggei. l i `It will be observed that the faces of said rollers are eve-n horizontally with` the face ofthe roller E, and. that injfront of saidfrollersE `Eis a guide, Q, imme-` diatelyV above which is a orrespoudinglguide, It.

i `On the opposite side offsaid rollers 'are similar guides, S T.,

Like letters of reference refer `to likedparts in the' Said guides are denominated upper and lower guides and consist of short ribs, equal in` thickness to thecoll larsof the rollers,and are arrangedinv line therewith, butare not of the same depth of the collars; hence, when the rollers or thev collars thereof fare in contact, 'the guides will not be. v l U and V,.ig. 2, are cog-wheels secured to theshafts ofthe rollers E F, whereby they are driven, the wheels receivingl motionV from theV spurAvheels'A B', loosely Y I fittedto the .shaft D', and made vto revolve therewith .by means of a sliding clutch,1E' operated by the lever v F', projectedthrough the vertical lever K.

" The spur-wheels A B' receive motion from the intermediate spur-wheel G', connected to the drivingpower by the shaft H. Y

, `Tothe outerend ofeach of the plain rollers O P is secured apulley, 1', whereby'motion is obtained to them bythe belts J', fromthe pulley K o n thefshaft D', bythe spur-gearing and roller.

` By this arrangement ofthe pulleys` and belts, the

above snid plain :roller O has a common rotating movement with the roller E, and in the same` direction, whereas the roller l? rotates only on the reverse move-Y ment of the roller, but remains idleduring the direct or positive movement thereof.- l

i' Thepracticaluse andV operation of this machine are as follows, viz: Y Y

As above saidthis mill. is for Yrolling ingots into barsl or blooms. 'llhisis ordinarily done by passing the ingot between a pair-of rollers of a certain vdistance between them.V The ingot, after Vbeing `passed through-the 1 rollers from the front, is returned to the front over the upper roller,to be again run through the second passor groove, and soon for each time that the ingot is'V run through from the front. It is returned from the rear to the front over the upper roller by an. attendy ant for -that purpose.

This matter of returning the ingot is a work reqnir ing great` exertion and strength, and occupying much time,.during which the iugot is rapidly cooling, thereby requiring eitherincreased pressure or more repeated rollings to reduce vit to the required sized bloom. To save this labor and time, or repeated rolling of the ingot, is the purpose of this mill, which, on beingput in motion, the ingot isinserted between the rollers at.

the pass or groove 1, from the side shown in tig. l, by laying it upon the roller D, which, revolving in the same direction as the compressing-rollers, carries it toward them betweenjthe guides Q. The distance between the rollers is supposed to be seveu'inches; hence, the ingot, on passing through them,-will he of that. thickness. I l

Now, -instead of returning the partially-rolled ingot to the front ot' the machine over the upper roller, as required in the ordinary mill, it is returned through B', thereby reversing the movement of the rollers, and

which, at the same time, operates the adj listing-screws H, by the vertical lever K and links above described.

This simultaneous movement of the screws with the reaction of the rollers will set the upperroller closer to the under, some three-eighths'ot' an inch. With the now reversed movement'ot' the rollers, the roller P will be actuated by a ratchet-wheel and pawl, P, fig. 4, whereby the roller ismade to engage the pilley I', on the rotating reaction of the pressing-roller E l", but which remains stationary on the first or positive movement. The roller P carries the iugots to the rollers, through which it repasses, and is reduced three-eighths ot' an inch, equal to the distance that the roller 11 was adjusted vby the screws. The ingot, on being thus returned through the rollers to the front ofthe 1nill,is now turned one-quarter around, and run through the second groove or pass, 2.

The movement oi' the-rollers is reversed for this purpose to the lirst or direct movement-,hy shifting the clutch again from the wheel B to the wheel A'.

By this shifting of the clutch from the wheel B' to the wheel A', the adjusting-screws are turned back, thereby allowing the upper roller to recede from the lower one, by means of the counterbalance-weightsO, figs. l and 2, attached to the roller for thatpurpose.

lhe ingot, on being run through the second pass, is returned therein by again reversing the rotating movement of the rollers, by means of the clutch, which, in so doing,"will 'operate' the adjusting-screws in the same way, and to the same extent, as before described.

The now actuated roller l will carry the ingot to the rollers, through which it runs, and is reduced thereby in thickness threc-eighths of au inch, as in' the first instance, and so on through the whole number of the passes.

Thus, each time 4that the iugot is run through from the front to the rear of the'mill, it is reduced in thickness by the increased diameters of the rollers, which, as a consequence, lessens the depths of the passes, or the vert-ical distace between t-he grooves, and so on the return of the ingot from the rear to the front side, the vertical distance between the `grooves or passes is shortened three-eighths ot' an inch by the adjustincntof the upper roller inthe manner above described, the adjustment of the roller being made simultane.

ously with the shifting of the clutch for the reactin the rollers, to cause the return of the ingot.

It will be obvious that, in rerollng the iugot by repassing it through `the same groove, the labor of lifting it over the upper rollerisavoided, and that it is being rolled during theftime required to pass it over the roller in the ordinary way; hence, there can be no loss of time, andV a consequent loss oi' heat, while rolling the ingot, or whilethe ingot is from between the rollers.

Mills in .ordinary use are provided with guides some three-fourths as high as the ingot, on the front or positive side, only to prevent the ingot from entering vthe groove erosswise,`but have more guides at the top or either side. Owing to the great height of the guides, in proportion to the thicknessof the ingot, they would oer an obstruction'to the repassing of the ingot, as the pins or sprawls on the side of the ingot would strike against them, and either' prevent the ingot from entering the groove, or divert it from a direct passage through; hence, the guides are made much lower than the thickness of the iugot, and', placing one above and one below, the iugot is guided straightly into the pass, while the pills, should there be any, will pass between the guides without interfering therewith.

Claims.

the rollers E F, in the manneras described, and for the purpose specified. t v

DAVID I. JONES.

I Witnesses;

STEPHEN FORBES, R. J. CHRISTY. 

